December weather forecast
Blairstown, NJ

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Weather in December

December, the first month of the winter in Blairstown, is also a wintry month, with an average temperature ranging between max 38.5°F (3.6°C) and min 27.3°F (-2.6°C).

Temperature

Blairstown's transition into December involves a shift in temperature, receding from a chilly 48.2°F (9°C) in November to a wintry 38.5°F (3.6°C). An average low-temperature of 27.3°F (-2.6°C) is noted during the month of December.

Humidity

February and December, with an average relative humidity of 82%, are the most humid months.

Rainfall

In Blairstown, New Jersey, during December, the rain falls for 5.6 days and regularly aggregates up to 0.67" (17mm) of precipitation. In Blairstown, during the entire year, the rain falls for 89.8 days and collects up to 8.07" (205mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In Blairstown, in December, snow falls for 3.4 days, with typically accumulated 0.71" (18mm) of snow. Throughout the year, in Blairstown, New Jersey, there are 22.7 snowfall days, and 3.54" (90mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 18min of daylight.
On the first day of December, sunrise is at 7:05 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 4:41 pm EST.

Sunshine

In December, the average sunshine is 4.6h.

UV index

With an average maximum UV index of 1, December is the month with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum daily UV index of 1 in December interprets into the following recommendations:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. To guard against the harmful effects of the Sun, minimize exposure during midday. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.

Frequently asked questions

How cold is December?

In December, the average high-temperature and low-temperature are 38.5°F (3.6°C) and 27.3°F (-2.6°C) respectively. The average heat index (a.k.a. 'felt air temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, in July is appraised at 89.6°F (32°C).

What are the most humid months?

The months with the highest humidity are February and December, with an average relative humidity of 82%.

What is the average humidity in December?

In Blairstown, the average relative humidity in December is 82%.

How many days does it rain in December?

In Blairstown, in December, it is raining for 5.6 days, with typically 0.67" (17mm) of accumulated precipitation.

How many days does it snow in December?

In December, it is snowing for 3.4 days. Throughout December, 0.71" (18mm) of snow is accumulated.

What is the month with the shortest days?

With an average of 9h and 18min of daylight, December has the shortest days of the year.

How many hours of daylight does Blairstown have in December?

In December, the average day length is 9h and 17min.

When is the sunrise / sunset in December?

In December, on the first day of the month, sunrise is at 7:05 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 4:41 pm EST.

How many hours of sunshine does Blairstown have in December?

The average sunshine duration in December is 4.6h.

When is the lowest UV index?

With an average maximum UV index of 1, December is the month with the lowest UV index in Blairstown.

What is the UV index intensity in December?

In Blairstown, the average daily maximum UV index in December is 1. A UV Index of 2, and less, symbolizes a low health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Blairstown, NJ

Average temperature in December - Blairstown, NJ
  • Average high temperature in December: 38.5°F

The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (33.3°F).

  • Average low temperature in December: 27.3°F

The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).

Average pressure in December
Blairstown, NJ

Average pressure in December - Blairstown, NJ
  • Average pressure in December: 30.08"Hg

The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in December
Blairstown, NJ

Average wind speed in December - Blairstown, NJ
  • Average wind speed in December: 7.1mph

The windiest month (with the highest average wind speed) is March (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).

Average humidity in December
Blairstown, NJ

Average humidity in December - Blairstown, NJ
  • Average humidity in December: 82%

The months with the highest relative humidity are February and December (82%).
The month with the lowest relative humidity is April (76%).

Average rainfall in December
Blairstown, NJ

Average rainfall in December - Blairstown, NJ
  • Average rainfall in December: 0.67"

The wettest month (with the highest rainfall) is July (0.98").
The driest month (with the least rainfall) is September (0.24").

Average rainfall days in December
Blairstown, NJ

Average rainfall days in December - Blairstown, NJ
  • Average rainfall days in December: 5.6 days

The months with the highest number of rainy days are April and May (10.5 days).
The month with the least rainy days is February (4.5 days).

Average snowfall in December
Blairstown, NJ

Average snowfall in December - Blairstown, NJ
  • Average snowfall in December: 0.71"

The months with the highest snowfall are January and February (0.91").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Blairstown, NJ

Average snowfall days in December - Blairstown, NJ
  • Average snowfall days in December: 3.4 days

The month with the highest number of snowfall days is February (7.2 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Blairstown, NJ

Average daylight in December / Average sunshine in December - Blairstown, NJ
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in December: 4h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).

Average sunshine days in December
Blairstown, NJ

Average sunshine days in December - Blairstown, NJ
  • Average sunshine days in December: 23.1 days

The month with the most sunshine days is September (23.2 days).
The month with the least sunshine days is April (18 days).

Average UV index in December
Blairstown, NJ

Average UV index in December - Blairstown, NJ
  • Average UV index in December: 1

The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in December
Blairstown, NJ

Average cloud cover in December - Blairstown, NJ
  • Average cloud cover in December: 51

The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 37).

Average visibility in December
Blairstown, NJ

Average visibility in December - Blairstown, NJ
  • Average visibility in December: 5mi

The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).

Blairstown, New Jersey, USA

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